title: Trends in improving the embryonic stem cell test (EST): an overview.
mesh_terms: D000826:Animal Testing Alternatives / Q000592:standards; D000818:Animals; D004622:Embryo, Mammalian / Q000187:drug effects; D005434:Flow Cytometry / Q000379:methods; D051379:Mice; D013234:Stem Cells / Q000166:cytology*; D018675:Toxicity Tests / Q000379:methods